Joburg residents should be vigilant and obtain clarity about their property valuations as there is confusion between two different supplementary valuation rolls which have been released in recent months.

Residents have until November 23 to examine a secondary supplementary roll recently issued.

A few months ago, the values of about 83 000 properties were affected by a first supplementary valuation roll.

Hot on the heels followed another valuation roll, this time affecting around 25 000 properties.

DA councillor Linus Muller, member of the Section 79 oversight committee for finance, said residents could be confused between the two rolls.

"Legislation compels the city to reflect all changes on properties in a supplementary valuation roll. Affected property owners should be notified by the city, but we have not had confirmation from any ratepayers to this effect," he said.

More than 40 percent of the 25 000 properties on the supplementary valuation roll consist of property category change from vacant to improved land where new buildings have been developed.

A further 30 percent consist of new properties that have been registered such as subdivisions, consolidations and sectional title units.

Other changes include valuation changes where additions have been completed and revaluation where additional property information was supplied.

"Property values need to be realistic and taxes need to be paid accordingly, but in the first supplementary valuation roll, we saw many examples of incorrect calculations," he said.

"The DA is concerned about the outstanding objections of the first roll that have not been finalised. The city has responded that it would take up to eight months to handle the few thousand objections received.

"It is unclear if the city has made provision for the influx that might occur due to the next roll being published," he said.

In the meantime, ratepayers are compelled, by law, to pay the new tariff, including back-dated payments. Legislation makes provision for any person to object to an entry in a valuation roll, provided they do so in the prescribed manner and within the prescribed period.